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Estimation of thermal structure in the mantle wedge of northeastern Japan from seismic attenuation data

Estimation of thermal structure in the mantle wedge of northeastern Japan from seismic... We estimated thermal structure in the mantle wedge of NE Japan by applying the experimental results of olivine‐dominated rocks to seismic attenuation data. Obtained temperatures at a 40 km depth are 1000–1130°C and 960–1090°C beneath the volcanic front and the back‐arc side, respectively. We cannot obtain the areas with a temperature higher than 1400°C in the mantle wedge, which have been inferred from petrological studies. This is perhaps due to the localization of such anomalous areas. The obtained temperature is higher than that of the wet solidus of peridotite in the greater part of the back‐arc side, which suggests that the addition of aqueous fluids plays an important role in generating melts in the mantle wedge. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Geophysical Research Letters Wiley

Estimation of thermal structure in the mantle wedge of northeastern Japan from seismic attenuation data

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References (25)

Publisher
Wiley
Copyright
Copyright © 2003 by the American Geophysical Union.
ISSN
0094-8276
eISSN
1944-8007
DOI
10.1029/2003GL017185
Publisher site
See Article on Publisher Site

Abstract

We estimated thermal structure in the mantle wedge of NE Japan by applying the experimental results of olivine‐dominated rocks to seismic attenuation data. Obtained temperatures at a 40 km depth are 1000–1130°C and 960–1090°C beneath the volcanic front and the back‐arc side, respectively. We cannot obtain the areas with a temperature higher than 1400°C in the mantle wedge, which have been inferred from petrological studies. This is perhaps due to the localization of such anomalous areas. The obtained temperature is higher than that of the wet solidus of peridotite in the greater part of the back‐arc side, which suggests that the addition of aqueous fluids plays an important role in generating melts in the mantle wedge.

Journal

Geophysical Research LettersWiley

Published: Jul 1, 2003

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